Windows: Mozilla's Thunderbird is a solid email client, but it can be a bit sluggish and it still doesn't support 64-bit processors. FossaMail is a freely downloadable clone optimized for 64-bit systems, all while supporting the same extensions.

Win/Mac/Linux: Folders and labels in Thunderbird are great for at keeping your mail organized and out of your inbox, but they all look alike. Color Folders is a simple add-on that lets you customize the folders in Thunderbird however you like—by priority, to match your Gmail labels, or just according to your tastes.

Webmail is great, portable, and accessible everywhere, but desktop email clients have a ton of great benefits too. From encryption you can trust to easy backups, there are a ton of great features you can only get—or get easily—with a desktop client like Postbox, Thunderbird, or Outlook. Here are some of the best ones.

Between constant password breaches and the NSA looking in on everything you do, you've probably got privacy on the mind lately. If you're looking for a little personal privacy in your communications with friends and loved ones, or you just want to trust that the documents you email to your accountant or client aren't…

If you're going to email people, you're going to run into attachment size limits. It's a fact. You might not have noticed, but email client Thunderbird makes it nice and easy to convert attachments into Dropbox, Box.net, and other cloud storage links.

Dear Lifehacker,
Desktop email clients like Sparrow and Postbox seem like they're breathing new life into desktop email, but I'd also heard that Thunderbird is going into "maintenance mode." It got me thinking: Should I be using a desktop email client? A lot of people I know just use webmail (specifically, Gmail),…

Windows/Mac: Now that Thunderbird has all but shut down development, some of you may be looking for a new desktop email client. Postbox, one of our favorite email clients around, is now much cheaper at $10, and it's the perfect replacement.

If you're wedded to one platform, it's a good bet you already have a tool that keeps your life synchronized and organized pretty well. For those of us who have to deal with multiple platforms, multiple computers and mobile devices with multiple operating systems, and work with people who use different ones than we…

If you use Gmail you're familiar with the personal level indicators where a small arrow indicates whether an email was sent to just you, or a group of people. Personal Level Indicators is a small add-on for Thunderbird that adds the same feature to your desktop email client.

Windows/Mac/Linux: Thunderbird, our favorite Windows and Linux email client, updated today with a few new features sure to make browsing your email more convenient, including keyboard shortcuts and search in the context menu.

Just as they've recently updated Firefox to Firefox 8, the Mozilla team released today an update to their email client, Thunderbird. The major new feature in Thunderbird 8 is its blocking of automatic add-on installations from third parties.

It doesn't matter what you do, modern jobs seem to require that everyone barrage you with email at all hours of the day. If you're feeling overwhelmed and like you'll never get back to a clean inbox, here are ten of our favorite tips to help you manage the ever-growing mountain of email.

Like most Ubuntu updates, version 11.10 isn't a huge overhaul; rather, it improves on the big changes made in 11.04, by cleaning up the Dash, overhauling the Ubuntu Software Center, and bringing in some new default software. Here's a look at the biggest changes in the newest version of Ubuntu.